here's the image link:

http://www.asthmaqld.org.au/images/events/Golf%20Day%202007/dyson_logo2.jpg

It is much nicer if you post the image directly. :^)

It's custom.
AGFA Monotype has a long list of clients who've made use of our custom type services. Recently completed projects include 'Mylius Sans Headline Extra Bold' for British Airways.We've also recently helped the people at Dyson develop a custom font from their logo and we've reworked much of the London Underground typeface family, 'New Johnston TFL', making it more suited to modern computer environments.

Similar fonts: Bayer Sans and Bauhaus, House Industries Neutraface and Chalet .

Also Ubuntu's Title Font is similar in a rounded sense. I can be downloaded here: https://wiki.ubuntu.com/DIYMarketing#head-f0bb61686afeac4fd9af60297b48b6...

here's another along the Ubuntu line: http://www.myfonts.com/fonts/insigne/chennai/